About a Typical Pneumatic Circuit
6-17
KVAL 994-X Operation/Service Manual
About Cylinder Operation
To see a block diagram of general pneumatic connections,
see
ure below, shows a cross-section of a cylinder in action.
Retract Motion
Extend Motion
Air
Air
1.
PLC drives Control Valve.
2.
Valve delivers compressed
air to the cylinder.
3.
Cylinder piston rod is
extended when air is
delivered to port
“A”
4.
Cylinder piston rod is
retracted when air is
delivered to port
“B”
FIGURE 6- 35.
Cross-section of Air Cylinder
How the Pneumatic System Works
The Pneumatic system consists of a brain (PLC), an action (Positioning System), and a result
(Moving the Load).
For a generalized representative, this section describes the process to
move a router to the extend and the retract position with a double valve.
Extend Process
If
PLC
determines the conditions are right to extend the
Router
:
1.
The
PLC
applies the control voltage to the
Control Valve
which directs com-
pressed air to extend port of the
Cylinder
.
2.
The
Cylinder
and
Router
are extended deactivating the
Retract Sensor
3.
The
Router
fully extends activating the
Extend Sensor.
Summary of Contents for 994-X
Page 4: ...KVAL 994 X Operation Service Manual ...
Page 31: ...Safety Sign Off Sheet 1 21 KVAL 994 X Operation Service Manual ...
Page 32: ...Safety Sign Off Sheet KVAL 994 X Operation Service Manual 1 22 ...
Page 110: ...Calibration of the Back Section KVAL 994 X Operation Service Manual 3 22 ...
Page 114: ...System IT Administration KVAL 994 X Operation Service Manual 4 4 ...
Page 144: ...Collet Torque Values KVAL 994 X Operation Service Manual 5 30 ...
Page 180: ...Symptoms and Possible Causes KVAL 994 X Operation Service Manual 6 36 ...
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